andrews



WILLIAMI-I. ANDREWS, OE NEW HAVEN, CONNECTICUT, ASSIGNOR TO BURTONMALLORY, 0F SAME PLAGE.

Leners Patent No. 77,344, dans Apre 186s.

IMPROVEMENT IN ATTAGHING DOOR-KNOBS T40 SPINDLES.

dige Sagunto aterra in in; tlgtsc tetas ntnrt mit attingere nftige-samt.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, lVILLIAM H. ANDREWS, of New I-Iaven,in the county ofNewl Haven, and State of Connecticut, have invented a new Improvement inExtensiondnebs; and I do hereby declare the following, when. taken inconnection with the accompanying drawings, and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,end which said drawings constitute part of this specification andrepresent, in l l Figure 1,'a side View.

Figure 2, a slcction of the spindle on line zx, looking towards theknob; and'in Figure 3, a longitudinal central section.

This invention relates to an improvement in the manner of securing theknob to its spindle, whereby it may be readily adjusted to differentthickness of doors without the intervention ot' the' washers in generaluse; and consists in the arrangement of the set-screw, so as to passthrough the neck of the knob into one of the angles of the opening inthe neck, formed solids to receive the spindle, and so -as to bear uponone angle ofthe spindle, and force the opposite angle of thelspindleinto the corresponding angle of the neck ofthe knob, so as to wedge thesaid opposite angle hard down' into the neck of the knob, and so as tohold the one firmly upon the other at whatevervpoint on the said spindlethe screw is set down.

To enable others to construct my improvement, I lwill proceed todescribe the same as illustrated in the accompanying drawings.

A is a` knob, attached to its neck B in the usual manner, and the neck Balso constructed in the usual manner, save that the screw a is insertedso as to pass through one of the angles of the said knob, as seen iniig. 2. The spindle C is of the ordinary square bar, one end secured tothe fixed knobv in the usual"manner, near the other end of the saidspindle, and upon one angle a portion is cut away, as at d, iig. 3,'andas seen in section, fig. 2, so as to form a flat surface upon the saidangle, and so'tllat when the spindle is inserted into the neck, as seenin the drawing, and the screw c turned down on to the said flat surface,it wedges the opposite angle rmly into the neck of the knob, and thenthelarge bearing-surface, which isgiven between two oi' the sides of thespindle and the neck, creates so much friction, that at whatever pointthe screw is turned down, there the knob will be securely held.

The flattened surface is parallel with the axis of the spindle from endto end, so that the screw is turned in to the same depth at any point onthe surface.

I have represented and described one angle of the spindle as beingflattened, and this I believe to be the best, cheapest, and vmostconvenient arrangement, but yet any arrangement by which the bearing ofthe screw may be made to come upon one angle, so as to bear the oppositeangle into the neck, as described, fully accomplishes the full objectand intent of my invention, and it may be done by fitting a saddlebeneath the screw, or it may be a hardened screw with a flat point, soas to bear directly upon the upper angle.

'lhis adjustment avoids all necessity of washers or other device, and isextremely simple, and cheaper in its construction than any other'adjustment known. i

I'Iaving thus fully described my invention, what I claim as new anduseful, and desire to secure by Letters Patent, ise Forming upon oneangle of the spindle a flat surface parallel with the axis of thespindle, combined with a set-screw in the neck of the knob, so as tosecure the knob to the spindle, substantially as set forth.

I WM. H. ANDREW", Witnesses JOHN E. Emmi,"- A. J. TIBBITs.

